| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method and manufacturing device used for it improving yield and reliability for a lithium-ion secondary battery made sealing in a case a wound-round element formed by folding a laminated body of a positive electrode, a negative electrode, and a separator one or more times in the same direction and filling electrolyte solution in it. <P>SOLUTION: In forming a wound-round element, an initial part of winding of the laminated body 5 is virtually in a folded state, and so damage such as a crack occurs at that part. Since the positive electrode and the negative electrode constituting the laminated body 5 are formed by coating of slurries containing powder of an electrode active material and a binder, a solvent dissolving the binder is coated with the use of a solvent coating unit 7 on a part where the laminated body 5 is folded for the first time and then the body is folded. With this, the binder at the part is swollen to manifest elongation and flexibility, so that damage accompanying bending and folding hardly occurs. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
